package com.startchat.filter.filter;

import android.content.Context;
import android.opengl.GLES20;

import com.startchat.filter.R;
import com.startchat.filter.gles.GlUtil;

import java.nio.ByteBuffer;
import java.nio.FloatBuffer;

public class CameraFilterSkinWhite extends CameraFilter {

    protected int mSkinWhiteTextureId;
    private int mTexelHeightUniformLocation;
    private int mTexelWidthUniformLocation;
    private int mToneCurveTextureUniformLocation;

    public CameraFilterSkinWhite(Context context) {
        super(context);
        mSkinWhiteTextureId = GlUtil.createTexture(GLES20.GL_TEXTURE_2D);
        initByteBuffer();
    }

    public CameraFilterSkinWhite(Context context, boolean isForCamera) {
        super(context, isForCamera);
        mSkinWhiteTextureId = GlUtil.createTexture(GLES20.GL_TEXTURE_2D);
        initByteBuffer();
    }


    @Override
    protected int createProgram(Context applicationContext) {
        return GlUtil.createProgram(applicationContext, R.raw.vertex_shader_default,
                R.raw.fragment_shader_ext_skinwhiten, mIsForCamera);
    }


    private void initByteBuffer() {
        byte[] arrayOfByte = new byte[1024];
        int[] arrayOfInt1 = {95, 95, 96, 97, 97, 98, 99, 99, 100, 101, 101, 102, 103, 104, 104, 105, 106, 106, 107, 108, 108, 109, 110, 111, 111, 112, 113, 113, 114, 115, 115, 116, 117, 117, 118, 119, 120, 120, 121, 122, 122, 123, 124, 124, 125, 126, 127, 127, 128, 129, 129, 130, 131, 131, 132, 133, 133, 134, 135, 136, 136, 137, 138, 138, 139, 140, 140, 141, 142, 143, 143, 144, 145, 145, 146, 147, 147, 148, 149, 149, 150, 151, 152, 152, 153, 154, 154, 155, 156, 156, 157, 158, 159, 159, 160, 161, 161, 162, 163, 163, 164, 165, 165, 166, 167, 168, 168, 169, 170, 170, 171, 172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 179, 180, 181, 181, 182, 183, 184, 184, 185, 186, 186, 187, 188, 188, 189, 190, 191, 191, 192, 193, 193, 194, 195, 195, 196, 197, 197, 198, 199, 200, 200, 201, 202, 202, 203, 204, 204, 205, 206, 207, 207, 208, 209, 209, 210, 211, 211, 212, 213, 213, 214, 215, 216, 216, 217, 218, 218, 219, 220, 220, 221, 222, 223, 223, 224, 225, 225, 226, 227, 227, 228, 229, 229, 230, 231, 232, 232, 233, 234, 234, 235, 236, 236, 237, 238, 239, 239, 240, 241, 241, 242, 243, 243, 244, 245, 245, 246, 247, 248, 248, 249, 250, 250, 251, 252, 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255};
        int[] arrayOfInt2 = {0, 0, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 23, 23, 23, 24, 24, 24, 25, 25, 25, 25, 26, 26, 27, 27, 28, 28, 28, 28, 29, 29, 30, 29, 31, 31, 31, 31, 32, 32, 33, 33, 34, 34, 34, 34, 35, 35, 36, 36, 37, 37, 37, 38, 38, 39, 39, 39, 40, 40, 40, 41, 42, 42, 43, 43, 44, 44, 45, 45, 45, 46, 47, 47, 48, 48, 49, 50, 51, 51, 52, 52, 53, 53, 54, 55, 55, 56, 57, 57, 58, 59, 60, 60, 61, 62, 63, 63, 64, 65, 66, 67, 68, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 88, 89, 90, 91, 93, 94, 95, 96, 97, 98, 100, 101, 103, 104, 105, 107, 108, 110, 111, 113, 115, 116, 118, 119, 120, 122, 123, 125, 127, 128, 130, 132, 134, 135, 137, 139, 141, 143, 144, 146, 148, 150, 152, 154, 156, 158, 160, 163, 165, 167, 169, 171, 173, 175, 178, 180, 182, 185, 187, 189, 192, 194, 197, 199, 201, 204, 206, 209, 211, 214, 216, 219, 221, 224, 226, 229, 232, 234, 236, 239, 241, 245, 247, 250, 252, 255};
        for (int i = 0; i < 256; i++) {
            arrayOfByte[(i * 4)] = ((byte) arrayOfInt1[i]);
            arrayOfByte[(1 + i * 4)] = ((byte) arrayOfInt1[i]);
            arrayOfByte[(2 + i * 4)] = ((byte) arrayOfInt2[i]);
            arrayOfByte[(3 + i * 4)] = -1;
        }
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, 256, 1, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ByteBuffer.wrap(arrayOfByte));
    }

    @Override
    protected void getGLSLValues() {
        super.getGLSLValues();

        mToneCurveTextureUniformLocation = GLES20.glGetUniformLocation(mProgramHandle, "curve");
        mTexelWidthUniformLocation = GLES20.glGetUniformLocation(mProgramHandle, "texelWidthOffset");
        mTexelHeightUniformLocation = GLES20.glGetUniformLocation(mProgramHandle, "texelHeightOffset");
    }

    @Override
    protected void bindTexture(int textureId) {
        super.bindTexture(textureId);
        if (mSkinWhiteTextureId != -1) {
            GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mSkinWhiteTextureId);
            GLES20.glUniform1i(this.mToneCurveTextureUniformLocation, 3);
        }
    }

    @Override
    protected void bindGLSLValues(float[] mvpMatrix, FloatBuffer vertexBuffer, int coordsPerVertex,
                                  int vertexStride, float[] texMatrix, FloatBuffer texBuffer, int texStride) {
        super.bindGLSLValues(mvpMatrix, vertexBuffer, coordsPerVertex, vertexStride, texMatrix,
                texBuffer, texStride);

        if (mIncomingWidth != 0 && mIncomingHeight != 0) {
            GLES20.glUniform1f(mTexelWidthUniformLocation, (1.0f / (float) mIncomingWidth));
            GLES20.glUniform1f(mTexelHeightUniformLocation, (1.0f / (float) mIncomingWidth));
        }

    }

    @Override
    protected void unbindGLSLValues() {
        super.unbindGLSLValues();
//        GLES20.glDisable(mToneCurveTextureUniformLocation);
//        GLES20.glDisable(mTexelWidthUniformLocation);
//        GLES20.glDisable(mTexelHeightUniformLocation);
    }

    @Override
    protected void unbindTexture() {
        super.unbindTexture();
        if (mSkinWhiteTextureId != -1) {
            GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
            GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        }
    }
}